A: Each team's playing lines are limited to 18 total skaters, plus two
goalies for 20. However, since coaches can't be expected to check their
teams after every game, the extra players are allowed on the roster
(and in the sub lines) in case of injury.

Q: Why are regulation ties and overtime ties combined in the team
records?

A: Because the hockey sim is only one of five sports simulations, it has
to share some of the traits of the other games. The three-record system
was engrained in the DEL system long before the NHL switched the rules,
which makes it very hard to change. Given that both results give a team
a point in the standings, the effect is minor.

A: This gives the coach control over combinations of forwards and
defensemen on the ice with minimal complexity in the coaching orders.
Otherwise, one would need to set the lines and pairs, the preferred
combinations, and coaching orders for various combinations.